This time let’s to talk about the PCB testing. When the printed circuit boards are finisehd, we should test PCB for short or open circuit condition, we can use optical test or E-test way to test.

Optical test methods identify defects in each layer by scanning, the electronic testing is usual using Flying flying-probe to check all connections. E-test for short circuit or open circuit much more accurate, but the optical test can more easily detect incorrectgap problems between conductors.

CMD Circuits have the very strict quality control and testing machines, please don’t worry about the quality of our circuit boards.